CN103910511A - A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve - Google Patents

A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve Download PDF

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Publication number
CN103910511A
CN103910511A CN201410092637.8A CN201410092637A CN103910511A CN 103910511 A CN103910511 A CN 103910511A CN 201410092637 A CN201410092637 A CN 201410092637A CN 103910511 A CN103910511 A CN 103910511A
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CN
China
Prior art keywords
super
strength steel
sleeve connection
omnidistance
steel muscle
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Pending
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CN201410092637.8A
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Chinese (zh)
Inventor
张亚梅
于超
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Southeast University
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Southeast University
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Publication date
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Priority to CN201410092637.8A priority Critical patent/CN103910511A/en
Publication of CN103910511A publication Critical patent/CN103910511A/en
Pending legal-status Critical Current

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention discloses a superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve. The grouting material comprises following components by weight: 30-45% of silicate cement, 5-20% of ultrafine ore powder, 2-10% of silica fume, 0.2-1% of an earlier-stage expanding agent, 2-10% of a middle- and later- stage expanding agent, 0.1-0.5% of defoaming agent, 0.7-1.5% of an efficient water reducing agent and 35-50% of quartz sand, with the water-glue ratio being 0.16-0.20. The grouting material has advantages of high fluidity, the 3-day compressive strength higher than 75 MPa, the 28-day compressive strength higher than 110 MPa, no water bleeding, no isolation or layering, micro-expansion, good durability, and the like.

Description

A kind of omnidistance without shrinking super-high strength steel muscle sleeve connection injection material
Technical field
The invention belongs to building material field, be specifically related to a kind of super-high strength steel muscle sleeve connection injection material.
Background technology
In the last few years, prefabricated concrete structure has had certain development in China, Duo Jia unit has carried out part technical study, and in the project of the exploitation such as company limited, Ruian, Shanghai group is contracted in Vanke Co., Ltd, Nantong construction work, obtains demonstration and the application of certain scale.Adopt prefabricated assembled concrete structure, compared with cast-in-place concrete structure, not only can improve construction quality, simultaneously can saving resource, the energy, reduce and pollute and carbon emission, can also reduce site operation personnel etc., therefore in the building field of future city, there is vast potential for future development.And the Performance and quality that prefabricated components reinforcing bar connects is the important guarantee of building structure globality security.
Conventional sleeve connecting reinforcement in engineering now, its principle is that precast concrete pours into special cement-based grouting material in the steel bushing that is inserted with reinforcing bar when mounted, sand-cement slurry sclerosis links together reinforcing bar and sleeve securely, reaches the object of connecting reinforcement.But the grouting material quality on existing market is uneven, particularly the grouting material of superelevation strength micro expansion type is not also a lot, therefore for having having great significance for the reinforced bar sleeve connection research of grouting material of the strong high workability microdilatancy of superelevation type.
Summary of the invention
Technical problem: main purpose of the present invention, higher for existing injection material water-cement ratio, the problem of bleeding, segregation demixing phenomenon and undercapacity easily appears in slurry, provides a kind of omnidistance without shrinking super-high strength steel muscle sleeve connection injection material.
Technical scheme: a kind of omnidistance nothing of the present invention is shunk super-high strength steel muscle sleeve connection injection material, on the basis of high efficiency water reducing agent, then mixes super finely ground slag and silicon ash, further improves reinforced bar sleeve and connects the mobility with grouting material.
Its composition and weight percent are:
The quality that wherein water-cement ratio is water and silicate cement, super finely ground slag and silicon ash quality and ratio.
The intensity of described silicate cement is not less than 42.5 strength grades.
Described silicon ash median size approximately 0.02 μ m.
Described ultrafine slag powder specific surface area is not less than 800m 2/ kg, median size≤4 μ m.
Described high efficiency water reducing agent water-reducing rate >=30%.
Described early expansion agent is sulplo-aluminate quasi-plastic property swelling agent.
Described middle and later periods swelling agent is the one in sulplo-aluminate class, CaO class swelling agent or MgO class swelling agent, total alkali content≤0.7%.
Described defoamer is polyether-modified silicon defoaming agent or dimethyl silicone oil defoamer.
Beneficial effect:
1. reinforced bar sleeve of the present invention connects with grouting material employing fine mineral component and high efficiency water reducing agent, makes it in the requirement that is issued to high fluidity compared with low water binder ratio.This grouting material water-cement ratio is between 0.16~0.20 time, and initial flow degree is 305~335mm, and 30min degree of mobilization is 295~320mm.
2. reinforced bar sleeve connection of the present invention adopts 52.5 silicate cements with grouting material, ensures that it has higher early strength and later strength.1d ultimate compression strength >=55MPa, 3d ultimate compression strength >=75MPa, 28d ultimate compression strength >=110MPa.
3. the present invention adopts one or more composition of concrete admixtures to use, and injection material has without bleeding, the features such as layering, microdilatancy, good endurance of not emanating.
Embodiment
Below in conjunction with specific examples come the present invention will be further described, below each embodiment only for the present invention being described but not limitation of the present invention.
Embodiment 1
By weight: cement 32%, silicon ash 5%, super finely ground slag 18%, early expansion agent 0.2%, CaO class swelling agent 8% defoamer 0.2%, quartz sand 35%, water-cement ratio 0.18;
Embodiment 2
By weight: cement 33%, silicon ash 6%, super finely ground slag 15%, early expansion agent 0.2%, sulplo-aluminate class swelling agent 6%, defoamer 0.2%, quartz sand 40%, water-cement ratio 0.20;
Embodiment 3
By weight: cement 39%, silicon ash 5%, super finely ground slag 12%, early expansion agent 0.3%, CaO class swelling agent 6% defoamer 0.2%, quartz sand 38%, water-cement ratio 0.18
Each component is mixed by above-mentioned weight ratio, adopt glue sand agitator to stir, churning time is 10min.
The physicals of grouting material sees the following form.

Claims (8)

1. omnidistance without shrinking a super-high strength steel muscle sleeve connection injection material, it is characterized in that: its composition and weight percent are:
The quality that wherein water-cement ratio is water and silicate cement, super finely ground slag and silicon ash quality and ratio.
2. a kind of omnidistance nothing according to claim 1 is shunk super-high strength steel muscle sleeve connection injection material, it is characterized in that, the intensity of described silicate cement is not less than 42.5 strength grades.
3. according to claim 1 a kind of omnidistance without contraction super-high strength steel muscle sleeve connection injection material, it is characterized in that the grey median size approximately 0.02 μ m of described silicon.
4. a kind of omnidistance nothing according to claim 1 is shunk super-high strength steel muscle sleeve connection injection material, it is characterized in that, described ultrafine slag powder specific surface area is not less than 800m 2/ kg, median size≤4 μ m.
5. according to claim 1 a kind of omnidistance without shrinking super-high strength steel muscle sleeve connection injection material, it is characterized in that described high efficiency water reducing agent water-reducing rate >=30%.
6. a kind of omnidistance nothing according to claim 1 is shunk super-high strength steel muscle sleeve connection injection material, it is characterized in that, described early expansion agent is sulplo-aluminate quasi-plastic property swelling agent.
7. a kind of omnidistance nothing according to claim 1 is shunk super-high strength steel muscle sleeve connection injection material, it is characterized in that, described middle and later periods swelling agent is the one in sulplo-aluminate class, CaO class swelling agent or MgO class swelling agent, total alkali content≤0.7%.
8. a kind of omnidistance nothing according to claim 1 is shunk super-high strength steel muscle sleeve connection injection material, it is characterized in that, described defoamer is polyether-modified silicon defoaming agent or dimethyl silicone oil defoamer.
CN201410092637.8A 2014-03-13 2014-03-13 A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve Pending CN103910511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410092637.8A CN103910511A (en) 2014-03-13 2014-03-13 A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410092637.8A CN103910511A (en) 2014-03-13 2014-03-13 A superhigh-strength grouting material free from shrinkage in the whole course used for connection of a steel bar and a sleeve

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CN103910511A true CN103910511A (en) 2014-07-09

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105439512A (en) * 2015-11-13 2016-03-30 江苏苏博特新材料股份有限公司 Ultrahigh strength cement-based grouting material easy to stir
CN105884284A (en) * 2016-05-11 2016-08-24 北京中德新亚建筑技术有限公司 Shrinkage-free self-compaction polymer concrete and preparation method thereof
CN105967568A (en) * 2016-05-11 2016-09-28 北京中德新亚建筑技术有限公司 High-strength shrinkage-free sleeve grouting material for rebar connection and preparing method of high-strength shrinkage-free sleeve grouting material
CN106316279A (en) * 2015-06-30 2017-01-11 上海宝冶集团有限公司 Grouting material composition for grouting connection of reinforcing steel bar and sleeve
CN106747128A (en) * 2017-03-10 2017-05-31 中建商品混凝土有限公司 A kind of big fluidised form High Strength Non-shrinking Filling Material and preparation method thereof
CN106830856A (en) * 2017-02-13 2017-06-13 武汉源锦建材科技有限公司 A kind of ungauged regions reinforcing bar sleeve for connection grouting material and preparation method thereof
CN107572978A (en) * 2017-09-27 2018-01-12 中建材中岩科技有限公司 Bar connecting sleeve grouting material and preparation method thereof
CN107935517A (en) * 2017-12-12 2018-04-20 中国建筑股份有限公司 Quick-hardening sleeve grouting material and its preparation and application for bar connecting

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102992722A (en) * 2012-12-14 2013-03-27 武汉理工大学 Ultrahigh-strength grouting material based on iron tailing sand and cement and preparation method of grouting material
CN103265253A (en) * 2013-05-08 2013-08-28 沈阳建筑大学 High-performance grouting material for prefabricated building construction, and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102992722A (en) * 2012-12-14 2013-03-27 武汉理工大学 Ultrahigh-strength grouting material based on iron tailing sand and cement and preparation method of grouting material
CN103265253A (en) * 2013-05-08 2013-08-28 沈阳建筑大学 High-performance grouting material for prefabricated building construction, and preparation method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106316279A (en) * 2015-06-30 2017-01-11 上海宝冶集团有限公司 Grouting material composition for grouting connection of reinforcing steel bar and sleeve
CN105439512A (en) * 2015-11-13 2016-03-30 江苏苏博特新材料股份有限公司 Ultrahigh strength cement-based grouting material easy to stir
CN105884284A (en) * 2016-05-11 2016-08-24 北京中德新亚建筑技术有限公司 Shrinkage-free self-compaction polymer concrete and preparation method thereof
CN105967568A (en) * 2016-05-11 2016-09-28 北京中德新亚建筑技术有限公司 High-strength shrinkage-free sleeve grouting material for rebar connection and preparing method of high-strength shrinkage-free sleeve grouting material
CN106830856A (en) * 2017-02-13 2017-06-13 武汉源锦建材科技有限公司 A kind of ungauged regions reinforcing bar sleeve for connection grouting material and preparation method thereof
CN106747128A (en) * 2017-03-10 2017-05-31 中建商品混凝土有限公司 A kind of big fluidised form High Strength Non-shrinking Filling Material and preparation method thereof
CN106747128B (en) * 2017-03-10 2019-07-12 中建商品混凝土有限公司 A kind of big fluidised form High Strength Non-shrinking Filling Material and preparation method thereof
CN107572978A (en) * 2017-09-27 2018-01-12 中建材中岩科技有限公司 Bar connecting sleeve grouting material and preparation method thereof
CN107935517A (en) * 2017-12-12 2018-04-20 中国建筑股份有限公司 Quick-hardening sleeve grouting material and its preparation and application for bar connecting
CN107935517B (en) * 2017-12-12 2020-06-26 中国建筑股份有限公司 Rapid hardening sleeve grouting material for steel bar connection and preparation and use methods thereof

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Application publication date: 20140709